From: Rémi Bernon rbernon@codeweavers.com
As a fallback if ChangeDisplaySettings returns E_NOTIMPL. --- dlls/win32u/driver.c | 2 +- dlls/win32u/sysparams.c | 53 +++++++++++++++++++++++++++++++++++++---- 2 files changed, 50 insertions(+), 5 deletions(-)
diff --git a/dlls/win32u/driver.c b/dlls/win32u/driver.c index f8aa15c46ce..e7dda4a5cf4 100644 --- a/dlls/win32u/driver.c +++ b/dlls/win32u/driver.c @@ -756,7 +756,7 @@ static void nulldrv_UpdateClipboard(void) static LONG nulldrv_ChangeDisplaySettings( LPDEVMODEW displays, LPCWSTR primary_name, HWND hwnd, DWORD flags, LPVOID lparam ) { - return DISP_CHANGE_FAILED; + return E_NOTIMPL; /* use default implementation */ }
static BOOL nulldrv_GetCurrentDisplaySettings( LPCWSTR name, BOOL is_primary, LPDEVMODEW mode ) diff --git a/dlls/win32u/sysparams.c b/dlls/win32u/sysparams.c index d1f9dc2c8ba..c6b71181608 100644 --- a/dlls/win32u/sysparams.c +++ b/dlls/win32u/sysparams.c @@ -509,6 +509,26 @@ static BOOL adapter_get_current_settings( const struct adapter *adapter, DEVMODE return user_driver->pGetCurrentDisplaySettings( adapter->dev.device_name, is_primary, mode ); }
+static BOOL adapter_set_current_settings( const struct adapter *adapter, const DEVMODEW *mode ) +{ + HANDLE mutex; + HKEY hkey; + BOOL ret; + + mutex = get_display_device_init_mutex(); + + if (!config_key && !(config_key = reg_open_key( NULL, config_keyW, sizeof(config_keyW) ))) ret = FALSE; + if (!(hkey = reg_open_key( config_key, adapter->config_key, lstrlenW( adapter->config_key ) * sizeof(WCHAR) ))) ret = FALSE; + else + { + ret = write_adapter_mode( hkey, ENUM_CURRENT_SETTINGS, mode ); + NtClose( hkey ); + } + + release_display_device_init_mutex( mutex ); + return ret; +} + static int mode_compare(const void *p1, const void *p2) { BOOL a_interlaced, b_interlaced, a_stretched, b_stretched; @@ -1537,6 +1557,9 @@ static BOOL update_display_cache( BOOL force )
if (!user_driver->pUpdateDisplayDevices( &device_manager, force, &ctx ) && force) { + /* default implementation: expose an adapter and a monitor with few standard modes, + * and read / write current display settings from / to the registry. + */ static const DEVMODEW modes[] = { { .dmFields = DM_DISPLAYORIENTATION | DM_BITSPERPEL | DM_PELSWIDTH | DM_PELSHEIGHT | DM_DISPLAYFLAGS | DM_DISPLAYFREQUENCY, @@ -1560,13 +1583,24 @@ static BOOL update_display_cache( BOOL force ) struct gdi_monitor monitor = { .state_flags = DISPLAY_DEVICE_ACTIVE | DISPLAY_DEVICE_ATTACHED, - .rc_monitor = {.right = modes[2].dmPelsWidth, .bottom = modes[2].dmPelsHeight}, - .rc_work = {.right = modes[2].dmPelsWidth, .bottom = modes[2].dmPelsHeight}, }; + DEVMODEW mode = {{0}}; UINT i;
add_gpu( &gpu, &ctx ); add_adapter( &adapter, &ctx ); + + if (!read_adapter_mode( ctx.adapter_key, ENUM_CURRENT_SETTINGS, &mode )) + { + mode = modes[2]; + mode.dmFields |= DM_POSITION; + write_adapter_mode( ctx.adapter_key, ENUM_CURRENT_SETTINGS, &mode ); + } + monitor.rc_monitor.right = mode.dmPelsWidth; + monitor.rc_monitor.bottom = mode.dmPelsHeight; + monitor.rc_work.right = mode.dmPelsWidth; + monitor.rc_work.bottom = mode.dmPelsHeight; + add_monitor( &monitor, &ctx ); for (i = 0; i < ARRAY_SIZE(modes); ++i) add_mode( modes + i, &ctx ); } @@ -2427,8 +2461,8 @@ static LONG apply_display_settings( const WCHAR *devname, const DEVMODEW *devmod { WCHAR primary_name[CCHDEVICENAME]; struct display_device *primary; + DEVMODEW *mode, *displays; struct adapter *adapter; - DEVMODEW *displays; LONG ret;
if (!lock_display_devices()) return DISP_CHANGE_FAILED; @@ -2451,7 +2485,18 @@ static LONG apply_display_settings( const WCHAR *devname, const DEVMODEW *devmod if (!(primary = find_adapter_device_by_id( 0 ))) primary_name[0] = 0; else wcscpy( primary_name, primary->device_name );
- ret = user_driver->pChangeDisplaySettings( displays, primary_name, hwnd, flags, lparam ); + if ((ret = user_driver->pChangeDisplaySettings( displays, primary_name, hwnd, flags, lparam ))) + { + /* default implementation: write current display settings to the registry. */ + mode = displays; + LIST_FOR_EACH_ENTRY( adapter, &adapters, struct adapter, entry ) + { + if (!adapter_set_current_settings( adapter, mode )) + WARN( "Failed to write adapter %s current mode.\n", debugstr_w(adapter->dev.device_name) ); + mode = NEXT_DEVMODEW(mode); + } + ret = DISP_CHANGE_SUCCESSFUL; + } unlock_display_devices();
free( displays );